drivers/thermal/samsung/exynos_tmu.c

   1 /*
   2  * exynos_tmu.c - Samsung EXYNOS TMU (Thermal Management Unit)
   3  *
   4  *  Copyright (C) 2011 Samsung Electronics
   5  *  Donggeun Kim <dg77.kim@samsung.com>
   6  *  Amit Daniel Kachhap <amit.kachhap@linaro.org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  */
  23
  24 #include <linux/clk.h>
  25 #include <linux/io.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/module.h>
  28 #include <linux/of.h>
  29 #include <linux/of_address.h>
  30 #include <linux/of_irq.h>
  31 #include <linux/platform_device.h>
  32 #include <linux/regulator/consumer.h>
  33
  34 #include "exynos_thermal_common.h"
  35 #include "exynos_tmu.h"
  36 #include "exynos_tmu_data.h"
  37
  38 /**
  39  * struct exynos_tmu_data : A structure to hold the private data of the TMU
  40         driver
  41  * @id: identifier of the one instance of the TMU controller.
  42  * @pdata: pointer to the tmu platform/configuration data
  43  * @base: base address of the single instance of the TMU controller.
  44  * @base_second: base address of the common registers of the TMU controller.
  45  * @irq: irq number of the TMU controller.
  46  * @soc: id of the SOC type.
  47  * @irq_work: pointer to the irq work structure.
  48  * @lock: lock to implement synchronization.
  49  * @clk: pointer to the clock structure.
  50  * @clk_sec: pointer to the clock structure for accessing the base_second.
  51  * @temp_error1: fused value of the first point trim.
  52  * @temp_error2: fused value of the second point trim.
  53  * @regulator: pointer to the TMU regulator structure.
  54  * @reg_conf: pointer to structure to register with core thermal.
  55  */
  56 struct exynos_tmu_data {
  57         int id;
  58         struct exynos_tmu_platform_data *pdata;
  59         void __iomem *base;
  60         void __iomem *base_second;
  61         int irq;
  62         enum soc_type soc;
  63         struct work_struct irq_work;
  64         struct mutex lock;
  65         struct clk *clk, *clk_sec;
  66         u8 temp_error1, temp_error2;
  67         struct regulator *regulator;
  68         struct thermal_sensor_conf *reg_conf;
  69 };
  70
  71 /*
  72  * TMU treats temperature as a mapped temperature code.
  73  * The temperature is converted differently depending on the calibration type.
  74  */
  75 static int temp_to_code(struct exynos_tmu_data *data, u8 temp)
  76 {
  77         struct exynos_tmu_platform_data *pdata = data->pdata;
  78         int temp_code;
  79
  80         switch (pdata->cal_type) {
  81         case TYPE_TWO_POINT_TRIMMING:
  82                 temp_code = (temp - pdata->first_point_trim) *
  83                         (data->temp_error2 - data->temp_error1) /
  84                         (pdata->second_point_trim - pdata->first_point_trim) +
  85                         data->temp_error1;
  86                 break;
  87         case TYPE_ONE_POINT_TRIMMING:
  88                 temp_code = temp + data->temp_error1 - pdata->first_point_trim;
  89                 break;
  90         default:
  91                 temp_code = temp + pdata->default_temp_offset;
  92                 break;
  93         }
  94
  95         return temp_code;
  96 }
  97
  98 /*
  99  * Calculate a temperature value from a temperature code.
 100  * The unit of the temperature is degree Celsius.
 101  */
 102 static int code_to_temp(struct exynos_tmu_data *data, u8 temp_code)
 103 {
 104         struct exynos_tmu_platform_data *pdata = data->pdata;
 105         int temp;
 106
 107         switch (pdata->cal_type) {
 108         case TYPE_TWO_POINT_TRIMMING:
 109                 temp = (temp_code - data->temp_error1) *
 110                         (pdata->second_point_trim - pdata->first_point_trim) /
 111                         (data->temp_error2 - data->temp_error1) +
 112                         pdata->first_point_trim;
 113                 break;
 114         case TYPE_ONE_POINT_TRIMMING:
 115                 temp = temp_code - data->temp_error1 + pdata->first_point_trim;
 116                 break;
 117         default:
 118                 temp = temp_code - pdata->default_temp_offset;
 119                 break;
 120         }
 121
 122         return temp;
 123 }
 124
 125 static void exynos_tmu_clear_irqs(struct exynos_tmu_data *data)
 126 {
 127         const struct exynos_tmu_registers *reg = data->pdata->registers;
 128         unsigned int val_irq;
 129
 130         val_irq = readl(data->base + reg->tmu_intstat);
 131         /*
 132          * Clear the interrupts.  Please note that the documentation for
 133          * Exynos3250, Exynos4412, Exynos5250 and Exynos5260 incorrectly
 134          * states that INTCLEAR register has a different placing of bits
 135          * responsible for FALL IRQs than INTSTAT register.  Exynos5420
 136          * and Exynos5440 documentation is correct (Exynos4210 doesn't
 137          * support FALL IRQs at all).
 138          */
 139         writel(val_irq, data->base + reg->tmu_intclear);
 140 }
 141
 142 static int exynos_tmu_initialize(struct platform_device *pdev)
 143 {
 144         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 145         struct exynos_tmu_platform_data *pdata = data->pdata;
 146         const struct exynos_tmu_registers *reg = pdata->registers;
 147         unsigned int status, trim_info = 0, con, ctrl;
 148         unsigned int rising_threshold = 0, falling_threshold = 0;
 149         int ret = 0, threshold_code, i;
 150
 151         mutex_lock(&data->lock);
 152         clk_enable(data->clk);
 153         if (!IS_ERR(data->clk_sec))
 154                 clk_enable(data->clk_sec);
 155
 156         if (TMU_SUPPORTS(pdata, READY_STATUS)) {
 157                 status = readb(data->base + EXYNOS_TMU_REG_STATUS);
 158                 if (!status) {
 159                         ret = -EBUSY;
 160                         goto out;
 161                 }
 162         }
 163
 164         if (TMU_SUPPORTS(pdata, TRIM_RELOAD)) {
 165                 if (data->soc == SOC_ARCH_EXYNOS3250) {
 166                         ctrl = readl(data->base + EXYNOS_TMU_TRIMINFO_CON1);
 167                         ctrl |= EXYNOS_TRIMINFO_RELOAD_ENABLE;
 168                         writel(ctrl, data->base + EXYNOS_TMU_TRIMINFO_CON1);
 169                 }
 170                 ctrl = readl(data->base + EXYNOS_TMU_TRIMINFO_CON2);
 171                 ctrl |= EXYNOS_TRIMINFO_RELOAD_ENABLE;
 172                 writel(ctrl, data->base + EXYNOS_TMU_TRIMINFO_CON2);
 173         }
 174
 175         /* Save trimming info in order to perform calibration */
 176         if (data->soc == SOC_ARCH_EXYNOS5440) {
 177                 /*
 178                  * For exynos5440 soc triminfo value is swapped between TMU0 and
 179                  * TMU2, so the below logic is needed.
 180                  */
 181                 switch (data->id) {
 182                 case 0:
 183                         trim_info = readl(data->base +
 184                         EXYNOS5440_EFUSE_SWAP_OFFSET + EXYNOS5440_TMU_S0_7_TRIM);
 185                         break;
 186                 case 1:
 187                         trim_info = readl(data->base + EXYNOS5440_TMU_S0_7_TRIM);
 188                         break;
 189                 case 2:
 190                         trim_info = readl(data->base -
 191                         EXYNOS5440_EFUSE_SWAP_OFFSET + EXYNOS5440_TMU_S0_7_TRIM);
 192                 }
 193         } else {
 194                 /* On exynos5420 the triminfo register is in the shared space */
 195                 if (data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO)
 196                         trim_info = readl(data->base_second +
 197                                                 EXYNOS_TMU_REG_TRIMINFO);
 198                 else
 199                         trim_info = readl(data->base + EXYNOS_TMU_REG_TRIMINFO);
 200         }
 201         data->temp_error1 = trim_info & EXYNOS_TMU_TEMP_MASK;
 202         data->temp_error2 = ((trim_info >> EXYNOS_TRIMINFO_85_SHIFT) &
 203                                 EXYNOS_TMU_TEMP_MASK);
 204
 205         if (!data->temp_error1 ||
 206                 (pdata->min_efuse_value > data->temp_error1) ||
 207                 (data->temp_error1 > pdata->max_efuse_value))
 208                 data->temp_error1 = pdata->efuse_value & EXYNOS_TMU_TEMP_MASK;
 209
 210         if (!data->temp_error2)
 211                 data->temp_error2 =
 212                         (pdata->efuse_value >> EXYNOS_TRIMINFO_85_SHIFT) &
 213                         EXYNOS_TMU_TEMP_MASK;
 214
 215         rising_threshold = readl(data->base + reg->threshold_th0);
 216
 217         if (data->soc == SOC_ARCH_EXYNOS4210) {
 218                 /* Write temperature code for threshold */
 219                 threshold_code = temp_to_code(data, pdata->threshold);
 220                 writeb(threshold_code,
 221                         data->base + EXYNOS4210_TMU_REG_THRESHOLD_TEMP);
 222                 for (i = 0; i < pdata->non_hw_trigger_levels; i++)
 223                         writeb(pdata->trigger_levels[i], data->base +
 224                         reg->threshold_th0 + i * sizeof(reg->threshold_th0));
 225
 226                 exynos_tmu_clear_irqs(data);
 227         } else {
 228                 /* Write temperature code for rising and falling threshold */
 229                 for (i = 0; i < pdata->non_hw_trigger_levels; i++) {
 230                         threshold_code = temp_to_code(data,
 231                                                 pdata->trigger_levels[i]);
 232                         rising_threshold &= ~(0xff << 8 * i);
 233                         rising_threshold |= threshold_code << 8 * i;
 234                         if (pdata->threshold_falling) {
 235                                 threshold_code = temp_to_code(data,
 236                                                 pdata->trigger_levels[i] -
 237                                                 pdata->threshold_falling);
 238                                 falling_threshold |= threshold_code << 8 * i;
 239                         }
 240                 }
 241
 242                 writel(rising_threshold,
 243                                 data->base + reg->threshold_th0);
 244                 writel(falling_threshold,
 245                                 data->base + reg->threshold_th1);
 246
 247                 exynos_tmu_clear_irqs(data);
 248
 249                 /* if last threshold limit is also present */
 250                 i = pdata->max_trigger_level - 1;
 251                 if (pdata->trigger_levels[i] &&
 252                                 (pdata->trigger_type[i] == HW_TRIP)) {
 253                         threshold_code = temp_to_code(data,
 254                                                 pdata->trigger_levels[i]);
 255                         if (i == EXYNOS_MAX_TRIGGER_PER_REG - 1) {
 256                                 /* 1-4 level to be assigned in th0 reg */
 257                                 rising_threshold &= ~(0xff << 8 * i);
 258                                 rising_threshold |= threshold_code << 8 * i;
 259                                 writel(rising_threshold,
 260                                         data->base + reg->threshold_th0);
 261                         } else if (i == EXYNOS_MAX_TRIGGER_PER_REG) {
 262                                 /* 5th level to be assigned in th2 reg */
 263                                 rising_threshold =
 264                                 threshold_code << reg->threshold_th3_l0_shift;
 265                                 writel(rising_threshold,
 266                                         data->base + reg->threshold_th2);
 267                         }
 268                         con = readl(data->base + reg->tmu_ctrl);
 269                         con |= (1 << reg->therm_trip_en_shift);
 270                         writel(con, data->base + reg->tmu_ctrl);
 271                 }
 272         }
 273         /*Clear the PMIN in the common TMU register*/
 274         if (reg->tmu_pmin && !data->id)
 275                 writel(0, data->base_second + reg->tmu_pmin);
 276 out:
 277         clk_disable(data->clk);
 278         mutex_unlock(&data->lock);
 279         if (!IS_ERR(data->clk_sec))
 280                 clk_disable(data->clk_sec);
 281
 282         return ret;
 283 }
 284
 285 static void exynos_tmu_control(struct platform_device *pdev, bool on)
 286 {
 287         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 288         struct exynos_tmu_platform_data *pdata = data->pdata;
 289         const struct exynos_tmu_registers *reg = pdata->registers;
 290         unsigned int con, interrupt_en;
 291
 292         mutex_lock(&data->lock);
 293         clk_enable(data->clk);
 294
 295         con = readl(data->base + reg->tmu_ctrl);
 296
 297         if (pdata->test_mux)
 298                 con |= (pdata->test_mux << EXYNOS4412_MUX_ADDR_SHIFT);
 299
 300         con &= ~(EXYNOS_TMU_REF_VOLTAGE_MASK << EXYNOS_TMU_REF_VOLTAGE_SHIFT);
 301         con |= pdata->reference_voltage << EXYNOS_TMU_REF_VOLTAGE_SHIFT;
 302
 303         con &= ~(EXYNOS_TMU_BUF_SLOPE_SEL_MASK << EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT);
 304         con |= (pdata->gain << EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT);
 305
 306         if (pdata->noise_cancel_mode) {
 307                 con &= ~(reg->therm_trip_mode_mask <<
 308                                         reg->therm_trip_mode_shift);
 309                 con |= (pdata->noise_cancel_mode << reg->therm_trip_mode_shift);
 310         }
 311
 312         if (on) {
 313                 con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT);
 314                 interrupt_en =
 315                         pdata->trigger_enable[3] << reg->inten_rise3_shift |
 316                         pdata->trigger_enable[2] << reg->inten_rise2_shift |
 317                         pdata->trigger_enable[1] << reg->inten_rise1_shift |
 318                         pdata->trigger_enable[0] << reg->inten_rise0_shift;
 319                 if (TMU_SUPPORTS(pdata, FALLING_TRIP))
 320                         interrupt_en |=
 321                                 interrupt_en << reg->inten_fall0_shift;
 322         } else {
 323                 con &= ~(1 << EXYNOS_TMU_CORE_EN_SHIFT);
 324                 interrupt_en = 0; /* Disable all interrupts */
 325         }
 326         writel(interrupt_en, data->base + reg->tmu_inten);
 327         writel(con, data->base + reg->tmu_ctrl);
 328
 329         clk_disable(data->clk);
 330         mutex_unlock(&data->lock);
 331 }
 332
 333 static int exynos_tmu_read(struct exynos_tmu_data *data)
 334 {
 335         struct exynos_tmu_platform_data *pdata = data->pdata;
 336         const struct exynos_tmu_registers *reg = pdata->registers;
 337         u8 temp_code;
 338         int temp;
 339
 340         mutex_lock(&data->lock);
 341         clk_enable(data->clk);
 342
 343         temp_code = readb(data->base + reg->tmu_cur_temp);
 344
 345         if (data->soc == SOC_ARCH_EXYNOS4210)
 346                 /* temp_code should range between 75 and 175 */
 347                 if (temp_code < 75 || temp_code > 175) {
 348                         temp = -ENODATA;
 349                         goto out;
 350                 }
 351
 352         temp = code_to_temp(data, temp_code);
 353 out:
 354         clk_disable(data->clk);
 355         mutex_unlock(&data->lock);
 356
 357         return temp;
 358 }
 359
 360 #ifdef CONFIG_THERMAL_EMULATION
 361 static int exynos_tmu_set_emulation(void *drv_data, unsigned long temp)
 362 {
 363         struct exynos_tmu_data *data = drv_data;
 364         struct exynos_tmu_platform_data *pdata = data->pdata;
 365         const struct exynos_tmu_registers *reg = pdata->registers;
 366         unsigned int val;
 367         int ret = -EINVAL;
 368
 369         if (!TMU_SUPPORTS(pdata, EMULATION))
 370                 goto out;
 371
 372         if (temp && temp < MCELSIUS)
 373                 goto out;
 374
 375         mutex_lock(&data->lock);
 376         clk_enable(data->clk);
 377
 378         val = readl(data->base + reg->emul_con);
 379
 380         if (temp) {
 381                 temp /= MCELSIUS;
 382
 383                 if (TMU_SUPPORTS(pdata, EMUL_TIME)) {
 384                         val &= ~(EXYNOS_EMUL_TIME_MASK << reg->emul_time_shift);
 385                         val |= (EXYNOS_EMUL_TIME << reg->emul_time_shift);
 386                 }
 387                 val &= ~(EXYNOS_EMUL_DATA_MASK << reg->emul_temp_shift);
 388                 val |= (temp_to_code(data, temp) << reg->emul_temp_shift) |
 389                         EXYNOS_EMUL_ENABLE;
 390         } else {
 391                 val &= ~EXYNOS_EMUL_ENABLE;
 392         }
 393
 394         writel(val, data->base + reg->emul_con);
 395
 396         clk_disable(data->clk);
 397         mutex_unlock(&data->lock);
 398         return 0;
 399 out:
 400         return ret;
 401 }
 402 #else
 403 static int exynos_tmu_set_emulation(void *drv_data,     unsigned long temp)
 404         { return -EINVAL; }
 405 #endif/*CONFIG_THERMAL_EMULATION*/
 406
 407 static void exynos_tmu_work(struct work_struct *work)
 408 {
 409         struct exynos_tmu_data *data = container_of(work,
 410                         struct exynos_tmu_data, irq_work);
 411         struct exynos_tmu_platform_data *pdata = data->pdata;
 412         const struct exynos_tmu_registers *reg = pdata->registers;
 413         unsigned int val_type;
 414
 415         if (!IS_ERR(data->clk_sec))
 416                 clk_enable(data->clk_sec);
 417         /* Find which sensor generated this interrupt */
 418         if (reg->tmu_irqstatus) {
 419                 val_type = readl(data->base_second + reg->tmu_irqstatus);
 420                 if (!((val_type >> data->id) & 0x1))
 421                         goto out;
 422         }
 423         if (!IS_ERR(data->clk_sec))
 424                 clk_disable(data->clk_sec);
 425
 426         exynos_report_trigger(data->reg_conf);
 427         mutex_lock(&data->lock);
 428         clk_enable(data->clk);
 429
 430         /* TODO: take action based on particular interrupt */
 431         exynos_tmu_clear_irqs(data);
 432
 433         clk_disable(data->clk);
 434         mutex_unlock(&data->lock);
 435 out:
 436         enable_irq(data->irq);
 437 }
 438
 439 static irqreturn_t exynos_tmu_irq(int irq, void *id)
 440 {
 441         struct exynos_tmu_data *data = id;
 442
 443         disable_irq_nosync(irq);
 444         schedule_work(&data->irq_work);
 445
 446         return IRQ_HANDLED;
 447 }
 448
 449 static const struct of_device_id exynos_tmu_match[] = {
 450         {
 451                 .compatible = "samsung,exynos3250-tmu",
 452                 .data = (void *)EXYNOS3250_TMU_DRV_DATA,
 453         },
 454         {
 455                 .compatible = "samsung,exynos4210-tmu",
 456                 .data = (void *)EXYNOS4210_TMU_DRV_DATA,
 457         },
 458         {
 459                 .compatible = "samsung,exynos4412-tmu",
 460                 .data = (void *)EXYNOS4412_TMU_DRV_DATA,
 461         },
 462         {
 463                 .compatible = "samsung,exynos5250-tmu",
 464                 .data = (void *)EXYNOS5250_TMU_DRV_DATA,
 465         },
 466         {
 467                 .compatible = "samsung,exynos5260-tmu",
 468                 .data = (void *)EXYNOS5260_TMU_DRV_DATA,
 469         },
 470         {
 471                 .compatible = "samsung,exynos5420-tmu",
 472                 .data = (void *)EXYNOS5420_TMU_DRV_DATA,
 473         },
 474         {
 475                 .compatible = "samsung,exynos5420-tmu-ext-triminfo",
 476                 .data = (void *)EXYNOS5420_TMU_DRV_DATA,
 477         },
 478         {
 479                 .compatible = "samsung,exynos5440-tmu",
 480                 .data = (void *)EXYNOS5440_TMU_DRV_DATA,
 481         },
 482         {},
 483 };
 484 MODULE_DEVICE_TABLE(of, exynos_tmu_match);
 485
 486 static inline struct  exynos_tmu_platform_data *exynos_get_driver_data(
 487                         struct platform_device *pdev, int id)
 488 {
 489         struct  exynos_tmu_init_data *data_table;
 490         struct exynos_tmu_platform_data *tmu_data;
 491         const struct of_device_id *match;
 492
 493         match = of_match_node(exynos_tmu_match, pdev->dev.of_node);
 494         if (!match)
 495                 return NULL;
 496         data_table = (struct exynos_tmu_init_data *) match->data;
 497         if (!data_table || id >= data_table->tmu_count)
 498                 return NULL;
 499         tmu_data = data_table->tmu_data;
 500         return (struct exynos_tmu_platform_data *) (tmu_data + id);
 501 }
 502
 503 static int exynos_map_dt_data(struct platform_device *pdev)
 504 {
 505         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 506         struct exynos_tmu_platform_data *pdata;
 507         struct resource res;
 508         int ret;
 509
 510         if (!data || !pdev->dev.of_node)
 511                 return -ENODEV;
 512
 513         /*
 514          * Try enabling the regulator if found
 515          * TODO: Add regulator as an SOC feature, so that regulator enable
 516          * is a compulsory call.
 517          */
 518         data->regulator = devm_regulator_get(&pdev->dev, "vtmu");
 519         if (!IS_ERR(data->regulator)) {
 520                 ret = regulator_enable(data->regulator);
 521                 if (ret) {
 522                         dev_err(&pdev->dev, "failed to enable vtmu\n");
 523                         return ret;
 524                 }
 525         } else {
 526                 dev_info(&pdev->dev, "Regulator node (vtmu) not found\n");
 527         }
 528
 529         data->id = of_alias_get_id(pdev->dev.of_node, "tmuctrl");
 530         if (data->id < 0)
 531                 data->id = 0;
 532
 533         data->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
 534         if (data->irq <= 0) {
 535                 dev_err(&pdev->dev, "failed to get IRQ\n");
 536                 return -ENODEV;
 537         }
 538
 539         if (of_address_to_resource(pdev->dev.of_node, 0, &res)) {
 540                 dev_err(&pdev->dev, "failed to get Resource 0\n");
 541                 return -ENODEV;
 542         }
 543
 544         data->base = devm_ioremap(&pdev->dev, res.start, resource_size(&res));
 545         if (!data->base) {
 546                 dev_err(&pdev->dev, "Failed to ioremap memory\n");
 547                 return -EADDRNOTAVAIL;
 548         }
 549
 550         pdata = exynos_get_driver_data(pdev, data->id);
 551         if (!pdata) {
 552                 dev_err(&pdev->dev, "No platform init data supplied.\n");
 553                 return -ENODEV;
 554         }
 555         data->pdata = pdata;
 556         /*
 557          * Check if the TMU shares some registers and then try to map the
 558          * memory of common registers.
 559          */
 560         if (!TMU_SUPPORTS(pdata, ADDRESS_MULTIPLE))
 561                 return 0;
 562
 563         if (of_address_to_resource(pdev->dev.of_node, 1, &res)) {
 564                 dev_err(&pdev->dev, "failed to get Resource 1\n");
 565                 return -ENODEV;
 566         }
 567
 568         data->base_second = devm_ioremap(&pdev->dev, res.start,
 569                                         resource_size(&res));
 570         if (!data->base_second) {
 571                 dev_err(&pdev->dev, "Failed to ioremap memory\n");
 572                 return -ENOMEM;
 573         }
 574
 575         return 0;
 576 }
 577
 578 static int exynos_tmu_probe(struct platform_device *pdev)
 579 {
 580         struct exynos_tmu_data *data;
 581         struct exynos_tmu_platform_data *pdata;
 582         struct thermal_sensor_conf *sensor_conf;
 583         int ret, i;
 584
 585         data = devm_kzalloc(&pdev->dev, sizeof(struct exynos_tmu_data),
 586                                         GFP_KERNEL);
 587         if (!data)
 588                 return -ENOMEM;
 589
 590         platform_set_drvdata(pdev, data);
 591         mutex_init(&data->lock);
 592
 593         ret = exynos_map_dt_data(pdev);
 594         if (ret)
 595                 return ret;
 596
 597         pdata = data->pdata;
 598
 599         INIT_WORK(&data->irq_work, exynos_tmu_work);
 600
 601         data->clk = devm_clk_get(&pdev->dev, "tmu_apbif");
 602         if (IS_ERR(data->clk)) {
 603                 dev_err(&pdev->dev, "Failed to get clock\n");
 604                 return  PTR_ERR(data->clk);
 605         }
 606
 607         data->clk_sec = devm_clk_get(&pdev->dev, "tmu_triminfo_apbif");
 608         if (IS_ERR(data->clk_sec)) {
 609                 if (data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO) {
 610                         dev_err(&pdev->dev, "Failed to get triminfo clock\n");
 611                         return PTR_ERR(data->clk_sec);
 612                 }
 613         } else {
 614                 ret = clk_prepare(data->clk_sec);
 615                 if (ret) {
 616                         dev_err(&pdev->dev, "Failed to get clock\n");
 617                         return ret;
 618                 }
 619         }
 620
 621         ret = clk_prepare(data->clk);
 622         if (ret) {
 623                 dev_err(&pdev->dev, "Failed to get clock\n");
 624                 goto err_clk_sec;
 625         }
 626
 627         if (pdata->type == SOC_ARCH_EXYNOS3250 ||
 628             pdata->type == SOC_ARCH_EXYNOS4210 ||
 629             pdata->type == SOC_ARCH_EXYNOS4412 ||
 630             pdata->type == SOC_ARCH_EXYNOS5250 ||
 631             pdata->type == SOC_ARCH_EXYNOS5260 ||
 632             pdata->type == SOC_ARCH_EXYNOS5420_TRIMINFO ||
 633             pdata->type == SOC_ARCH_EXYNOS5440)
 634                 data->soc = pdata->type;
 635         else {
 636                 ret = -EINVAL;
 637                 dev_err(&pdev->dev, "Platform not supported\n");
 638                 goto err_clk;
 639         }
 640
 641         ret = exynos_tmu_initialize(pdev);
 642         if (ret) {
 643                 dev_err(&pdev->dev, "Failed to initialize TMU\n");
 644                 goto err_clk;
 645         }
 646
 647         exynos_tmu_control(pdev, true);
 648
 649         /* Allocate a structure to register with the exynos core thermal */
 650         sensor_conf = devm_kzalloc(&pdev->dev,
 651                                 sizeof(struct thermal_sensor_conf), GFP_KERNEL);
 652         if (!sensor_conf) {
 653                 ret = -ENOMEM;
 654                 goto err_clk;
 655         }
 656         sprintf(sensor_conf->name, "therm_zone%d", data->id);
 657         sensor_conf->read_temperature = (int (*)(void *))exynos_tmu_read;
 658         sensor_conf->write_emul_temp =
 659                 (int (*)(void *, unsigned long))exynos_tmu_set_emulation;
 660         sensor_conf->driver_data = data;
 661         sensor_conf->trip_data.trip_count = pdata->trigger_enable[0] +
 662                         pdata->trigger_enable[1] + pdata->trigger_enable[2]+
 663                         pdata->trigger_enable[3];
 664
 665         for (i = 0; i < sensor_conf->trip_data.trip_count; i++) {
 666                 sensor_conf->trip_data.trip_val[i] =
 667                         pdata->threshold + pdata->trigger_levels[i];
 668                 sensor_conf->trip_data.trip_type[i] =
 669                                         pdata->trigger_type[i];
 670         }
 671
 672         sensor_conf->trip_data.trigger_falling = pdata->threshold_falling;
 673
 674         sensor_conf->cooling_data.freq_clip_count = pdata->freq_tab_count;
 675         for (i = 0; i < pdata->freq_tab_count; i++) {
 676                 sensor_conf->cooling_data.freq_data[i].freq_clip_max =
 677                                         pdata->freq_tab[i].freq_clip_max;
 678                 sensor_conf->cooling_data.freq_data[i].temp_level =
 679                                         pdata->freq_tab[i].temp_level;
 680         }
 681         sensor_conf->dev = &pdev->dev;
 682         /* Register the sensor with thermal management interface */
 683         ret = exynos_register_thermal(sensor_conf);
 684         if (ret) {
 685                 dev_err(&pdev->dev, "Failed to register thermal interface\n");
 686                 goto err_clk;
 687         }
 688         data->reg_conf = sensor_conf;
 689
 690         ret = devm_request_irq(&pdev->dev, data->irq, exynos_tmu_irq,
 691                 IRQF_TRIGGER_RISING | IRQF_SHARED, dev_name(&pdev->dev), data);
 692         if (ret) {
 693                 dev_err(&pdev->dev, "Failed to request irq: %d\n", data->irq);
 694                 goto err_clk;
 695         }
 696
 697         return 0;
 698 err_clk:
 699         clk_unprepare(data->clk);
 700 err_clk_sec:
 701         if (!IS_ERR(data->clk_sec))
 702                 clk_unprepare(data->clk_sec);
 703         return ret;
 704 }
 705
 706 static int exynos_tmu_remove(struct platform_device *pdev)
 707 {
 708         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 709
 710         exynos_unregister_thermal(data->reg_conf);
 711
 712         exynos_tmu_control(pdev, false);
 713
 714         clk_unprepare(data->clk);
 715         if (!IS_ERR(data->clk_sec))
 716                 clk_unprepare(data->clk_sec);
 717
 718         if (!IS_ERR(data->regulator))
 719                 regulator_disable(data->regulator);
 720
 721         return 0;
 722 }
 723
 724 #ifdef CONFIG_PM_SLEEP
 725 static int exynos_tmu_suspend(struct device *dev)
 726 {
 727         exynos_tmu_control(to_platform_device(dev), false);
 728
 729         return 0;
 730 }
 731
 732 static int exynos_tmu_resume(struct device *dev)
 733 {
 734         struct platform_device *pdev = to_platform_device(dev);
 735
 736         exynos_tmu_initialize(pdev);
 737         exynos_tmu_control(pdev, true);
 738
 739         return 0;
 740 }
 741
 742 static SIMPLE_DEV_PM_OPS(exynos_tmu_pm,
 743                          exynos_tmu_suspend, exynos_tmu_resume);
 744 #define EXYNOS_TMU_PM   (&exynos_tmu_pm)
 745 #else
 746 #define EXYNOS_TMU_PM   NULL
 747 #endif
 748
 749 static struct platform_driver exynos_tmu_driver = {
 750         .driver = {
 751                 .name   = "exynos-tmu",
 752                 .owner  = THIS_MODULE,
 753                 .pm     = EXYNOS_TMU_PM,
 754                 .of_match_table = exynos_tmu_match,
 755         },
 756         .probe = exynos_tmu_probe,
 757         .remove = exynos_tmu_remove,
 758 };
 759
 760 module_platform_driver(exynos_tmu_driver);
 761
 762 MODULE_DESCRIPTION("EXYNOS TMU Driver");
 763 MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
 764 MODULE_LICENSE("GPL");
 765 MODULE_ALIAS("platform:exynos-tmu");